Internal State Modifying Device

1. A translation device comprising: an internal state changing device; and a generating device, the internal state changing device comprising processing circuitry configured to: change an internal state that is a final hidden state of an encoder, in a translation model that is a learned model constituted by an encoder-decoder model, as the translation model for translating an original sentence that is a sentence of a first language into a translated sentence that is a sentence of a second language, change the internal state based on a random number, set a numerical value range, and change the internal state in multiple ways based on a numerical value included in the set numerical value range, and the generating device comprising processing circuitry configured to: input a desired original sentence into each of multiple translation models generated by the internal state changing device, and generate multiple translated sentences in the second language corresponding to the desired original sentence.

2. The translation device according to claim 1, wherein the processing circuitry of the internal state changing device sets the numerical value range based on a translation result of a translation using the translation model.

3. The translation device according to claim 2, wherein the translation result is a length of the translated sentence that is translated using the translation model.

4. The translation device according to claim 2, wherein the translation result is a translation quality that is a quality of the translated sentence that is translated using the translation model.

5. The translation device according to claim 4, wherein the processing circuitry of the internal state changing device widens the numerical value range when the translation quality is higher than a predetermined quality, or narrows the numerical value range when the translation quality is lower than a predetermined quality.

6. The translation device according to claim 1, wherein the processing circuitry of the internal state changing device sets the numerical value range based on a comparison between the translated sentence obtained by translating the original sentence using the translation model and correct answer data of the second language corresponding to the original sentence.

7. The translation device according to claim 2, wherein the translation model includes the changed internal state.

8. The translation device according to claim 1, wherein the processing circuitry of the internal state changing device is further configured to: output the translated sentence obtained by translating the original sentence using the translation model including the changed internal state.